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 </pre><pre class="rust"><code><span class="doccomment">//! IP Fastfields support efficient scanning for range queries.
 //! We use this variant only if the fastfield exists, otherwise the default in `range_query` is
 //! used, which uses the term dictionary + postings.

 </span><span class="kw">use </span>std::net::Ipv6Addr;
 <span class="kw">use </span>std::ops::{Bound, RangeInclusive};
 <span class="kw">use </span>std::sync::Arc;

 <span class="kw">use </span>common::BinarySerializable;
 <span class="kw">use </span>fastfield_codecs::{Column, MonotonicallyMappableToU128};

 <span class="kw">use </span><span class="kw">super</span>::range_query::map_bound;
 <span class="kw">use super</span>::{ConstScorer, Explanation, Scorer, Weight};
 <span class="kw">use </span><span class="kw">crate</span>::fastfield::MultiValuedU128FastFieldReader;
 <span class="kw">use </span><span class="kw">crate</span>::schema::{Cardinality, Field};
 <span class="kw">use crate</span>::{DocId, DocSet, Score, SegmentReader, TantivyError, TERMINATED};

 <span class="doccomment">/// `IPFastFieldRangeWeight` uses the ip address fast field to execute range queries.
 </span><span class="kw">pub struct </span>IPFastFieldRangeWeight {
     field: Field,
     left_bound: Bound&lt;Ipv6Addr&gt;,
     right_bound: Bound&lt;Ipv6Addr&gt;,
 }

 <span class="kw">impl </span>IPFastFieldRangeWeight {
     <span class="kw">pub fn </span>new(field: Field, left_bound: <span class="kw-2">&amp;</span>Bound&lt;Vec&lt;u8&gt;&gt;, right_bound: <span class="kw-2">&amp;</span>Bound&lt;Vec&lt;u8&gt;&gt;) -&gt; <span class="self">Self </span>{
         <span class="kw">let </span>ip_from_bound_raw_data = |data: <span class="kw-2">&amp;</span>Vec&lt;u8&gt;| {
             <span class="kw">let </span>left_ip_u128: u128 =
                 u128::from_be(BinarySerializable::deserialize(<span class="kw-2">&amp;mut &amp;</span>data[..]).unwrap());
             Ipv6Addr::from_u128(left_ip_u128)
         };
         <span class="kw">let </span>left_bound = map_bound(left_bound, <span class="kw-2">&amp;</span>ip_from_bound_raw_data);
         <span class="kw">let </span>right_bound = map_bound(right_bound, <span class="kw-2">&amp;</span>ip_from_bound_raw_data);
         <span class="self">Self </span>{
             field,
             left_bound,
             right_bound,
         }
     }
 }

 <span class="kw">impl </span>Weight <span class="kw">for </span>IPFastFieldRangeWeight {
     <span class="kw">fn </span>scorer(<span class="kw-2">&amp;</span><span class="self">self</span>, reader: <span class="kw-2">&amp;</span>SegmentReader, boost: Score) -&gt; <span class="kw">crate</span>::Result&lt;Box&lt;<span class="kw">dyn </span>Scorer&gt;&gt; {
         <span class="kw">let </span>field_type = reader.schema().get_field_entry(<span class="self">self</span>.field).field_type();
         <span class="kw">match </span>field_type.fastfield_cardinality().unwrap() {
             Cardinality::SingleValue =&gt; {
                 <span class="kw">let </span>ip_addr_fast_field = reader.fast_fields().ip_addr(<span class="self">self</span>.field)<span class="question-mark">?</span>;
                 <span class="kw">let </span>value_range = bound_to_value_range(
                     <span class="kw-2">&amp;</span><span class="self">self</span>.left_bound,
                     <span class="kw-2">&amp;</span><span class="self">self</span>.right_bound,
                     ip_addr_fast_field.min_value(),
                     ip_addr_fast_field.max_value(),
                 );
                 <span class="kw">let </span>docset = IpRangeDocSet::new(
                     value_range,
                     IpFastFieldCardinality::SingleValue(ip_addr_fast_field),
                 );
                 <span class="prelude-val">Ok</span>(Box::new(ConstScorer::new(docset, boost)))
             }
             Cardinality::MultiValues =&gt; {
                 <span class="kw">let </span>ip_addr_fast_field = reader.fast_fields().ip_addrs(<span class="self">self</span>.field)<span class="question-mark">?</span>;
                 <span class="kw">let </span>value_range = bound_to_value_range(
                     <span class="kw-2">&amp;</span><span class="self">self</span>.left_bound,
                     <span class="kw-2">&amp;</span><span class="self">self</span>.right_bound,
                     ip_addr_fast_field.min_value(),
                     ip_addr_fast_field.max_value(),
                 );
                 <span class="kw">let </span>docset = IpRangeDocSet::new(
                     value_range,
                     IpFastFieldCardinality::MultiValue(ip_addr_fast_field),
                 );
                 <span class="prelude-val">Ok</span>(Box::new(ConstScorer::new(docset, boost)))
             }
         }
     }

     <span class="kw">fn </span>explain(<span class="kw-2">&amp;</span><span class="self">self</span>, reader: <span class="kw-2">&amp;</span>SegmentReader, doc: DocId) -&gt; <span class="kw">crate</span>::Result&lt;Explanation&gt; {
         <span class="kw">let </span><span class="kw-2">mut </span>scorer = <span class="self">self</span>.scorer(reader, <span class="number">1.0</span>)<span class="question-mark">?</span>;
         <span class="kw">if </span>scorer.seek(doc) != doc {
             <span class="kw">return </span><span class="prelude-val">Err</span>(TantivyError::InvalidArgument(<span class="macro">format!</span>(
                 <span class="string">&quot;Document #({}) does not match&quot;</span>,
                 doc
             )));
         }
         <span class="kw">let </span>explanation = Explanation::new(<span class="string">&quot;Const&quot;</span>, scorer.score());

         <span class="prelude-val">Ok</span>(explanation)
     }
 }

 <span class="kw">fn </span>bound_to_value_range(
     left_bound: <span class="kw-2">&amp;</span>Bound&lt;Ipv6Addr&gt;,
     right_bound: <span class="kw-2">&amp;</span>Bound&lt;Ipv6Addr&gt;,
     min_value: Ipv6Addr,
     max_value: Ipv6Addr,
 ) -&gt; RangeInclusive&lt;Ipv6Addr&gt; {
     <span class="kw">let </span>start_value = <span class="kw">match </span>left_bound {
         Bound::Included(ip_addr) =&gt; <span class="kw-2">*</span>ip_addr,
         Bound::Excluded(ip_addr) =&gt; Ipv6Addr::from(ip_addr.to_u128() + <span class="number">1</span>),
         Bound::Unbounded =&gt; min_value,
     };

     <span class="kw">let </span>end_value = <span class="kw">match </span>right_bound {
         Bound::Included(ip_addr) =&gt; <span class="kw-2">*</span>ip_addr,
         Bound::Excluded(ip_addr) =&gt; Ipv6Addr::from(ip_addr.to_u128() - <span class="number">1</span>),
         Bound::Unbounded =&gt; max_value,
     };
     start_value..=end_value
 }

 <span class="doccomment">/// Helper to have a cursor over a vec of docids
 </span><span class="kw">struct </span>VecCursor {
     docs: Vec&lt;u32&gt;,
     current_pos: usize,
 }
 <span class="kw">impl </span>VecCursor {
     <span class="kw">fn </span>new() -&gt; <span class="self">Self </span>{
         <span class="self">Self </span>{
             docs: Vec::with_capacity(<span class="number">32</span>),
             current_pos: <span class="number">0</span>,
         }
     }
     <span class="kw">fn </span>next(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;u32&gt; {
         <span class="self">self</span>.current_pos += <span class="number">1</span>;
         <span class="self">self</span>.current()
     }
     <span class="attribute">#[inline]
     </span><span class="kw">fn </span>current(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;u32&gt; {
         <span class="self">self</span>.docs.get(<span class="self">self</span>.current_pos).map(|el| <span class="kw-2">*</span>el <span class="kw">as </span>u32)
     }
     <span class="kw">fn </span>get_cleared_data(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="kw-2">&amp;mut </span>Vec&lt;u32&gt; {
         <span class="self">self</span>.docs.clear();
         <span class="self">self</span>.current_pos = <span class="number">0</span>;
         <span class="kw-2">&amp;mut </span><span class="self">self</span>.docs
     }
     <span class="kw">fn </span>last_value(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;u32&gt; {
         <span class="self">self</span>.docs.iter().last().cloned()
     }
     <span class="kw">fn </span>is_empty(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; bool {
         <span class="self">self</span>.current_pos &gt;= <span class="self">self</span>.docs.len()
     }
 }

 <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">enum </span>IpFastFieldCardinality {
     SingleValue(Arc&lt;<span class="kw">dyn </span>Column&lt;Ipv6Addr&gt;&gt;),
     MultiValue(MultiValuedU128FastFieldReader&lt;Ipv6Addr&gt;),
 }

 <span class="kw">impl </span>IpFastFieldCardinality {
     <span class="kw">fn </span>num_docs(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u32 {
         <span class="kw">match </span><span class="self">self </span>{
             IpFastFieldCardinality::SingleValue(single_value) =&gt; single_value.num_vals(),
             IpFastFieldCardinality::MultiValue(multi_value) =&gt; {
                 multi_value.get_index_reader().num_docs()
             }
         }
     }
 }

 <span class="kw">struct </span>IpRangeDocSet {
     <span class="doccomment">/// The range filter on the values.
     </span>value_range: RangeInclusive&lt;Ipv6Addr&gt;,
     ip_addr_fast_field: IpFastFieldCardinality,
     <span class="doccomment">/// The next docid start range to fetch (inclusive).
     </span>next_fetch_start: u32,
     <span class="doccomment">/// Number of docs range checked in a batch.
     ///
     /// There are two patterns.
     /// - We do a full scan. =&gt; We can load large chunks. We don&#39;t know in advance if seek call
     /// will come, so we start with small chunks
     /// - We load docs, interspersed with seek calls. When there are big jumps in the seek, we
     /// should load small chunks. When the seeks are small, we can employ the same strategy as on a
     /// full scan.
     </span>fetch_horizon: u32,
     <span class="doccomment">/// Current batch of loaded docs.
     </span>loaded_docs: VecCursor,
     last_seek_pos_opt: <span class="prelude-ty">Option</span>&lt;u32&gt;,
 }

 <span class="kw">const </span>DEFAULT_FETCH_HORIZON: u32 = <span class="number">128</span>;
 <span class="kw">impl </span>IpRangeDocSet {
     <span class="kw">fn </span>new(
         value_range: RangeInclusive&lt;Ipv6Addr&gt;,
         ip_addr_fast_field: IpFastFieldCardinality,
     ) -&gt; <span class="self">Self </span>{
         <span class="kw">let </span><span class="kw-2">mut </span>ip_range_docset = <span class="self">Self </span>{
             value_range,
             ip_addr_fast_field,
             loaded_docs: VecCursor::new(),
             next_fetch_start: <span class="number">0</span>,
             fetch_horizon: DEFAULT_FETCH_HORIZON,
             last_seek_pos_opt: <span class="prelude-val">None</span>,
         };
         ip_range_docset.reset_fetch_range();
         ip_range_docset.fetch_block();
         ip_range_docset
     }

     <span class="kw">fn </span>reset_fetch_range(<span class="kw-2">&amp;mut </span><span class="self">self</span>) {
         <span class="self">self</span>.fetch_horizon = DEFAULT_FETCH_HORIZON;
     }

     <span class="doccomment">/// Returns true if more data could be fetched
     </span><span class="kw">fn </span>fetch_block(<span class="kw-2">&amp;mut </span><span class="self">self</span>) {
         <span class="kw">const </span>MAX_HORIZON: u32 = <span class="number">100_000</span>;
         <span class="kw">while </span><span class="self">self</span>.loaded_docs.is_empty() {
             <span class="kw">let </span>finished_to_end = <span class="self">self</span>.fetch_horizon(<span class="self">self</span>.fetch_horizon);
             <span class="kw">if </span>finished_to_end {
                 <span class="kw">break</span>;
             }
             <span class="comment">// Fetch more data, increase horizon. Horizon only gets reset when doing a seek.
             </span><span class="self">self</span>.fetch_horizon = (<span class="self">self</span>.fetch_horizon * <span class="number">2</span>).min(MAX_HORIZON);
         }
     }

     <span class="doccomment">/// check if the distance between the seek calls is large
     </span><span class="kw">fn </span>is_last_seek_distance_large(<span class="kw-2">&amp;</span><span class="self">self</span>, new_seek: DocId) -&gt; bool {
         <span class="kw">if let </span><span class="prelude-val">Some</span>(last_seek_pos) = <span class="self">self</span>.last_seek_pos_opt {
             (new_seek - last_seek_pos) &gt;= <span class="number">128
         </span>} <span class="kw">else </span>{
             <span class="bool-val">true
         </span>}
     }

     <span class="doccomment">/// Fetches a block for docid range [next_fetch_start .. next_fetch_start + HORIZON]
     </span><span class="kw">fn </span>fetch_horizon(<span class="kw-2">&amp;mut </span><span class="self">self</span>, horizon: u32) -&gt; bool {
         <span class="kw">let </span><span class="kw-2">mut </span>finished_to_end = <span class="bool-val">false</span>;

         <span class="kw">let </span>limit = <span class="self">self</span>.ip_addr_fast_field.num_docs();
         <span class="kw">let </span><span class="kw-2">mut </span>end = <span class="self">self</span>.next_fetch_start + horizon;
         <span class="kw">if </span>end &gt;= limit {
             end = limit;
             finished_to_end = <span class="bool-val">true</span>;
         }

         <span class="kw">match </span><span class="kw-2">&amp;</span><span class="self">self</span>.ip_addr_fast_field {
             IpFastFieldCardinality::MultiValue(multi) =&gt; {
                 <span class="kw">let </span>last_value = <span class="self">self</span>.loaded_docs.last_value();

                 multi.get_docids_for_value_range(
                     <span class="self">self</span>.value_range.clone(),
                     <span class="self">self</span>.next_fetch_start..end,
                     <span class="self">self</span>.loaded_docs.get_cleared_data(),
                 );
                 <span class="comment">// In case of multivalues, we may have an overlap of the same docid between fetching
                 // blocks
                 </span><span class="kw">if let </span><span class="prelude-val">Some</span>(last_value) = last_value {
                     <span class="kw">while </span><span class="self">self</span>.loaded_docs.current() == <span class="prelude-val">Some</span>(last_value) {
                         <span class="self">self</span>.loaded_docs.next();
                     }
                 }
             }
             IpFastFieldCardinality::SingleValue(single) =&gt; {
                 single.get_docids_for_value_range(
                     <span class="self">self</span>.value_range.clone(),
                     <span class="self">self</span>.next_fetch_start..end,
                     <span class="self">self</span>.loaded_docs.get_cleared_data(),
                 );
             }
         }
         <span class="self">self</span>.next_fetch_start = end;

         finished_to_end
     }
 }

 <span class="kw">impl </span>DocSet <span class="kw">for </span>IpRangeDocSet {
     <span class="attribute">#[inline]
     </span><span class="kw">fn </span>advance(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; DocId {
         <span class="kw">if let </span><span class="prelude-val">Some</span>(docid) = <span class="self">self</span>.loaded_docs.next() {
             docid <span class="kw">as </span>u32
         } <span class="kw">else </span>{
             <span class="kw">if </span><span class="self">self</span>.next_fetch_start &gt;= <span class="self">self</span>.ip_addr_fast_field.num_docs() <span class="kw">as </span>u32 {
                 <span class="kw">return </span>TERMINATED;
             }
             <span class="self">self</span>.fetch_block();
             <span class="self">self</span>.loaded_docs.current().unwrap_or(TERMINATED)
         }
     }

     <span class="attribute">#[inline]
     </span><span class="kw">fn </span>doc(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; DocId {
         <span class="self">self</span>.loaded_docs
             .current()
             .map(|el| el <span class="kw">as </span>u32)
             .unwrap_or(TERMINATED)
     }

     <span class="doccomment">/// Advances the `DocSet` forward until reaching the target, or going to the
     /// lowest [`DocId`] greater than the target.
     ///
     /// If the end of the `DocSet` is reached, [`TERMINATED`] is returned.
     ///
     /// Calling `.seek(target)` on a terminated `DocSet` is legal. Implementation
     /// of `DocSet` should support it.
     ///
     /// Calling `seek(TERMINATED)` is also legal and is the normal way to consume a `DocSet`.
     </span><span class="kw">fn </span>seek(<span class="kw-2">&amp;mut </span><span class="self">self</span>, target: DocId) -&gt; DocId {
         <span class="kw">if </span><span class="self">self</span>.is_last_seek_distance_large(target) {
             <span class="self">self</span>.reset_fetch_range();
         }
         <span class="kw">if </span>target &gt; <span class="self">self</span>.next_fetch_start {
             <span class="self">self</span>.next_fetch_start = target;
         }
         <span class="kw">let </span><span class="kw-2">mut </span>doc = <span class="self">self</span>.doc();
         <span class="macro">debug_assert!</span>(doc &lt;= target);
         <span class="kw">while </span>doc &lt; target {
             doc = <span class="self">self</span>.advance();
         }
         <span class="self">self</span>.last_seek_pos_opt = <span class="prelude-val">Some</span>(target);
         doc
     }

     <span class="kw">fn </span>size_hint(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; u32 {
         <span class="number">0 </span><span class="comment">// heuristic possible by checking number of hits when fetching a block
     </span>}
 }

 <span class="attribute">#[cfg(test)]
 </span><span class="kw">mod </span>tests {
     <span class="kw">use </span>proptest::prelude::ProptestConfig;
     <span class="kw">use </span>proptest::strategy::Strategy;
     <span class="kw">use </span>proptest::{prop_oneof, proptest};

     <span class="kw">use super</span>::<span class="kw-2">*</span>;
     <span class="kw">use </span><span class="kw">crate</span>::collector::Count;
     <span class="kw">use </span><span class="kw">crate</span>::query::QueryParser;
     <span class="kw">use </span><span class="kw">crate</span>::schema::{IpAddrOptions, Schema, FAST, STORED, STRING};
     <span class="kw">use </span><span class="kw">crate</span>::Index;

     <span class="attribute">#[derive(Clone, Debug)]
     </span><span class="kw">pub struct </span>Doc {
         <span class="kw">pub </span>id: String,
         <span class="kw">pub </span>ip: Ipv6Addr,
     }

     <span class="kw">fn </span>operation_strategy() -&gt; <span class="kw">impl </span>Strategy&lt;Value = Doc&gt; {
         <span class="macro">prop_oneof!</span>[
             (<span class="number">0u64</span>..<span class="number">10_000u64</span>).prop_map(doc_from_id_1),
             (<span class="number">1u64</span>..<span class="number">10_000u64</span>).prop_map(doc_from_id_2),
         ]
     }

     <span class="kw">pub fn </span>doc_from_id_1(id: u64) -&gt; Doc {
         <span class="kw">let </span>id = id * <span class="number">1000</span>;
         Doc {
             <span class="comment">// ip != id
             </span>id: id.to_string(),
             ip: Ipv6Addr::from_u128(id <span class="kw">as </span>u128),
         }
     }
     <span class="kw">fn </span>doc_from_id_2(id: u64) -&gt; Doc {
         <span class="kw">let </span>id = id * <span class="number">1000</span>;
         Doc {
             <span class="comment">// ip != id
             </span>id: (id - <span class="number">1</span>).to_string(),
             ip: Ipv6Addr::from_u128(id <span class="kw">as </span>u128),
         }
     }

     <span class="macro">proptest! </span>{
         <span class="attribute">#![proptest_config(ProptestConfig::with_cases(<span class="number">10</span>))]
         #[test]
         </span><span class="kw">fn </span>test_ip_range_for_docs_prop(ops <span class="kw">in </span>proptest::collection::vec(operation_strategy(), <span class="number">1</span>..<span class="number">1000</span>)) {
             <span class="macro">assert!</span>(test_ip_range_for_docs(ops).is_ok());
         }
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>ip_range_regression1_test() {
         <span class="kw">let </span>ops = <span class="macro">vec!</span>[doc_from_id_1(<span class="number">0</span>)];
         <span class="macro">assert!</span>(test_ip_range_for_docs(ops).is_ok());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>ip_range_regression2_test() {
         <span class="kw">let </span>ops = <span class="macro">vec!</span>[
             doc_from_id_1(<span class="number">52</span>),
             doc_from_id_1(<span class="number">63</span>),
             doc_from_id_1(<span class="number">12</span>),
             doc_from_id_2(<span class="number">91</span>),
             doc_from_id_2(<span class="number">33</span>),
         ];
         <span class="macro">assert!</span>(test_ip_range_for_docs(ops).is_ok());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>ip_range_regression3_test() {
         <span class="kw">let </span>ops = <span class="macro">vec!</span>[doc_from_id_1(<span class="number">1</span>), doc_from_id_1(<span class="number">2</span>), doc_from_id_1(<span class="number">3</span>)];
         <span class="macro">assert!</span>(test_ip_range_for_docs(ops).is_ok());
     }

     <span class="kw">pub fn </span>create_index_from_docs(docs: <span class="kw-2">&amp;</span>[Doc]) -&gt; Index {
         <span class="kw">let </span><span class="kw-2">mut </span>schema_builder = Schema::builder();
         <span class="kw">let </span>ip_field = schema_builder.add_ip_addr_field(<span class="string">&quot;ip&quot;</span>, STORED | FAST);
         <span class="kw">let </span>ips_field = schema_builder.add_ip_addr_field(
             <span class="string">&quot;ips&quot;</span>,
             IpAddrOptions::default()
                 .set_fast(Cardinality::MultiValues)
                 .set_indexed(),
         );
         <span class="kw">let </span>text_field = schema_builder.add_text_field(<span class="string">&quot;id&quot;</span>, STRING | STORED);
         <span class="kw">let </span>schema = schema_builder.build();
         <span class="kw">let </span>index = Index::create_in_ram(schema);

         {
             <span class="kw">let </span><span class="kw-2">mut </span>index_writer = index.writer(<span class="number">3_000_000</span>).unwrap();
             <span class="kw">for </span>doc <span class="kw">in </span>docs.iter() {
                 index_writer
                     .add_document(<span class="macro">doc!</span>(
                         ips_field =&gt; doc.ip,
                         ips_field =&gt; doc.ip,
                         ip_field =&gt; doc.ip,
                         text_field =&gt; doc.id.to_string(),
                     ))
                     .unwrap();
             }

             index_writer.commit().unwrap();
         }
         index
     }

     <span class="kw">fn </span>test_ip_range_for_docs(docs: Vec&lt;Doc&gt;) -&gt; <span class="kw">crate</span>::Result&lt;()&gt; {
         <span class="kw">let </span>index = create_index_from_docs(<span class="kw-2">&amp;</span>docs);
         <span class="kw">let </span>reader = index.reader().unwrap();
         <span class="kw">let </span>searcher = reader.searcher();

         <span class="kw">let </span>get_num_hits = |query| searcher.search(<span class="kw-2">&amp;</span>query, <span class="kw-2">&amp;</span>(Count)).unwrap();
         <span class="kw">let </span>query_from_text = |text: <span class="kw-2">&amp;</span>str| {
             QueryParser::for_index(<span class="kw-2">&amp;</span>index, <span class="macro">vec!</span>[])
                 .parse_query(text)
                 .unwrap()
         };

         <span class="kw">let </span>gen_query_inclusive = |field: <span class="kw-2">&amp;</span>str, from: Ipv6Addr, to: Ipv6Addr| {
             <span class="macro">format!</span>(<span class="string">&quot;{}:[{} TO {}]&quot;</span>, field, <span class="kw-2">&amp;</span>from.to_string(), <span class="kw-2">&amp;</span>to.to_string())
         };

         <span class="kw">let </span>test_sample = |sample_docs: Vec&lt;Doc&gt;| {
             <span class="kw">let </span><span class="kw-2">mut </span>ips: Vec&lt;Ipv6Addr&gt; = sample_docs.iter().map(|doc| doc.ip).collect();
             ips.sort();
             <span class="kw">let </span>expected_num_hits = docs
                 .iter()
                 .filter(|doc| (ips[<span class="number">0</span>]..=ips[<span class="number">1</span>]).contains(<span class="kw-2">&amp;</span>doc.ip))
                 .count();

             <span class="kw">let </span>query = gen_query_inclusive(<span class="string">&quot;ip&quot;</span>, ips[<span class="number">0</span>], ips[<span class="number">1</span>]);
             <span class="macro">assert_eq!</span>(get_num_hits(query_from_text(<span class="kw-2">&amp;</span>query)), expected_num_hits);

             <span class="kw">let </span>query = gen_query_inclusive(<span class="string">&quot;ips&quot;</span>, ips[<span class="number">0</span>], ips[<span class="number">1</span>]);
             <span class="macro">assert_eq!</span>(get_num_hits(query_from_text(<span class="kw-2">&amp;</span>query)), expected_num_hits);

             <span class="comment">// Intersection search
             </span><span class="kw">let </span>id_filter = sample_docs[<span class="number">0</span>].id.to_string();
             <span class="kw">let </span>expected_num_hits = docs
                 .iter()
                 .filter(|doc| (ips[<span class="number">0</span>]..=ips[<span class="number">1</span>]).contains(<span class="kw-2">&amp;</span>doc.ip) &amp;&amp; doc.id == id_filter)
                 .count();
             <span class="kw">let </span>query = <span class="macro">format!</span>(
                 <span class="string">&quot;{} AND id:{}&quot;</span>,
                 gen_query_inclusive(<span class="string">&quot;ip&quot;</span>, ips[<span class="number">0</span>], ips[<span class="number">1</span>]),
                 <span class="kw-2">&amp;</span>id_filter
             );
             <span class="macro">assert_eq!</span>(get_num_hits(query_from_text(<span class="kw-2">&amp;</span>query)), expected_num_hits);

             <span class="comment">// Intersection search on multivalue ip field
             </span><span class="kw">let </span>id_filter = sample_docs[<span class="number">0</span>].id.to_string();
             <span class="kw">let </span>query = <span class="macro">format!</span>(
                 <span class="string">&quot;{} AND id:{}&quot;</span>,
                 gen_query_inclusive(<span class="string">&quot;ips&quot;</span>, ips[<span class="number">0</span>], ips[<span class="number">1</span>]),
                 <span class="kw-2">&amp;</span>id_filter
             );
             <span class="macro">assert_eq!</span>(get_num_hits(query_from_text(<span class="kw-2">&amp;</span>query)), expected_num_hits);
         };

         test_sample(<span class="macro">vec!</span>[docs[<span class="number">0</span>].clone(), docs[<span class="number">0</span>].clone()]);
         <span class="kw">if </span>docs.len() &gt; <span class="number">1 </span>{
             test_sample(<span class="macro">vec!</span>[docs[<span class="number">0</span>].clone(), docs[<span class="number">1</span>].clone()]);
             test_sample(<span class="macro">vec!</span>[docs[<span class="number">1</span>].clone(), docs[<span class="number">1</span>].clone()]);
         }
         <span class="kw">if </span>docs.len() &gt; <span class="number">2 </span>{
             test_sample(<span class="macro">vec!</span>[docs[<span class="number">1</span>].clone(), docs[<span class="number">2</span>].clone()]);
         }

         <span class="prelude-val">Ok</span>(())
     }
 }

 <span class="attribute">#[cfg(all(test, feature = <span class="string">&quot;unstable&quot;</span>))]
 </span><span class="kw">mod </span>bench {

     <span class="kw">use </span>rand::rngs::StdRng;
     <span class="kw">use </span>rand::{Rng, SeedableRng};
     <span class="kw">use </span>test::Bencher;

     <span class="kw">use </span><span class="kw">super</span>::tests::<span class="kw-2">*</span>;
     <span class="kw">use super</span>::<span class="kw-2">*</span>;
     <span class="kw">use </span><span class="kw">crate</span>::collector::Count;
     <span class="kw">use </span><span class="kw">crate</span>::query::QueryParser;
     <span class="kw">use </span><span class="kw">crate</span>::Index;

     <span class="kw">fn </span>get_index_0_to_100() -&gt; Index {
         <span class="kw">let </span><span class="kw-2">mut </span>rng = StdRng::from_seed([<span class="number">1u8</span>; <span class="number">32</span>]);
         <span class="kw">let </span>num_vals = <span class="number">100_000</span>;
         <span class="kw">let </span>docs: Vec&lt;<span class="kw">_</span>&gt; = (<span class="number">0</span>..num_vals)
             .map(|_i| {
                 <span class="kw">let </span>id = <span class="kw">if </span>rng.gen_bool(<span class="number">0.01</span>) {
                     <span class="string">&quot;veryfew&quot;</span>.to_string() <span class="comment">// 1%
                 </span>} <span class="kw">else if </span>rng.gen_bool(<span class="number">0.1</span>) {
                     <span class="string">&quot;few&quot;</span>.to_string() <span class="comment">// 9%
                 </span>} <span class="kw">else </span>{
                     <span class="string">&quot;many&quot;</span>.to_string() <span class="comment">// 90%
                 </span>};
                 Doc {
                     id,
                     <span class="comment">// Multiply by 1000, so that we create many buckets in the compact space
                     // The benches depend on this range to select n-percent of elements with the
                     // methods below.
                     </span>ip: Ipv6Addr::from_u128(rng.gen_range(<span class="number">0</span>..<span class="number">100</span>) * <span class="number">1000</span>),
                 }
             })
             .collect();

         <span class="kw">let </span>index = create_index_from_docs(<span class="kw-2">&amp;</span>docs);
         index
     }

     <span class="kw">fn </span>get_90_percent() -&gt; RangeInclusive&lt;Ipv6Addr&gt; {
         <span class="kw">let </span>start = Ipv6Addr::from_u128(<span class="number">0</span>);
         <span class="kw">let </span>end = Ipv6Addr::from_u128(<span class="number">90 </span>* <span class="number">1000</span>);
         start..=end
     }

     <span class="kw">fn </span>get_10_percent() -&gt; RangeInclusive&lt;Ipv6Addr&gt; {
         <span class="kw">let </span>start = Ipv6Addr::from_u128(<span class="number">0</span>);
         <span class="kw">let </span>end = Ipv6Addr::from_u128(<span class="number">10 </span>* <span class="number">1000</span>);
         start..=end
     }

     <span class="kw">fn </span>get_1_percent() -&gt; RangeInclusive&lt;Ipv6Addr&gt; {
         <span class="kw">let </span>start = Ipv6Addr::from_u128(<span class="number">10 </span>* <span class="number">1000</span>);
         <span class="kw">let </span>end = Ipv6Addr::from_u128(<span class="number">10 </span>* <span class="number">1000</span>);
         start..=end
     }

     <span class="kw">fn </span>excute_query(
         field: <span class="kw-2">&amp;</span>str,
         ip_range: RangeInclusive&lt;Ipv6Addr&gt;,
         suffix: <span class="kw-2">&amp;</span>str,
         index: <span class="kw-2">&amp;</span>Index,
     ) -&gt; usize {
         <span class="kw">let </span>gen_query_inclusive = |from: <span class="kw-2">&amp;</span>Ipv6Addr, to: <span class="kw-2">&amp;</span>Ipv6Addr| {
             <span class="macro">format!</span>(
                 <span class="string">&quot;{}:[{} TO {}] {}&quot;</span>,
                 field,
                 <span class="kw-2">&amp;</span>from.to_string(),
                 <span class="kw-2">&amp;</span>to.to_string(),
                 suffix
             )
         };

         <span class="kw">let </span>query = gen_query_inclusive(ip_range.start(), ip_range.end());
         <span class="kw">let </span>query_from_text = |text: <span class="kw-2">&amp;</span>str| {
             QueryParser::for_index(<span class="kw-2">&amp;</span>index, <span class="macro">vec!</span>[])
                 .parse_query(text)
                 .unwrap()
         };
         <span class="kw">let </span>query = query_from_text(<span class="kw-2">&amp;</span>query);
         <span class="kw">let </span>reader = index.reader().unwrap();
         <span class="kw">let </span>searcher = reader.searcher();
         searcher.search(<span class="kw-2">&amp;</span>query, <span class="kw-2">&amp;</span>(Count)).unwrap()
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_90_percent(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ip&quot;</span>, get_90_percent(), <span class="string">&quot;&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_10_percent(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ip&quot;</span>, get_10_percent(), <span class="string">&quot;&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_1_percent(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ip&quot;</span>, get_1_percent(), <span class="string">&quot;&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_10_percent_intersect_with_10_percent(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ip&quot;</span>, get_10_percent(), <span class="string">&quot;AND id:few&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_1_percent_intersect_with_10_percent(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ip&quot;</span>, get_1_percent(), <span class="string">&quot;AND id:few&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_1_percent_intersect_with_90_percent(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ip&quot;</span>, get_1_percent(), <span class="string">&quot;AND id:many&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_1_percent_intersect_with_1_percent(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ip&quot;</span>, get_1_percent(), <span class="string">&quot;AND id:veryfew&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_10_percent_intersect_with_90_percent(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ip&quot;</span>, get_10_percent(), <span class="string">&quot;AND id:many&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_90_percent_intersect_with_90_percent(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ip&quot;</span>, get_90_percent(), <span class="string">&quot;AND id:many&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_90_percent_intersect_with_10_percent(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ip&quot;</span>, get_90_percent(), <span class="string">&quot;AND id:few&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_90_percent_intersect_with_1_percent(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ip&quot;</span>, get_90_percent(), <span class="string">&quot;AND id:veryfew&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_90_percent_multi(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ips&quot;</span>, get_90_percent(), <span class="string">&quot;&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_10_percent_multi(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ips&quot;</span>, get_10_percent(), <span class="string">&quot;&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_1_percent_multi(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ips&quot;</span>, get_1_percent(), <span class="string">&quot;&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_10_percent_intersect_with_10_percent_multi(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ips&quot;</span>, get_10_percent(), <span class="string">&quot;AND id:few&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_1_percent_intersect_with_10_percent_multi(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ips&quot;</span>, get_1_percent(), <span class="string">&quot;AND id:few&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_1_percent_intersect_with_90_percent_multi(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ips&quot;</span>, get_1_percent(), <span class="string">&quot;AND id:many&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_1_percent_intersect_with_1_percent_multi(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ips&quot;</span>, get_1_percent(), <span class="string">&quot;AND id:veryfew&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_10_percent_intersect_with_90_percent_multi(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ips&quot;</span>, get_10_percent(), <span class="string">&quot;AND id:many&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_90_percent_intersect_with_90_percent_multi(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ips&quot;</span>, get_90_percent(), <span class="string">&quot;AND id:many&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_90_percent_intersect_with_10_percent_multi(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ips&quot;</span>, get_90_percent(), <span class="string">&quot;AND id:few&quot;</span>, <span class="kw-2">&amp;</span>index));
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_ip_range_hit_90_percent_intersect_with_1_percent_multi(bench: <span class="kw-2">&amp;mut </span>Bencher) {
         <span class="kw">let </span>index = get_index_0_to_100();

         bench.iter(|| excute_query(<span class="string">&quot;ips&quot;</span>, get_90_percent(), <span class="string">&quot;AND id:veryfew&quot;</span>, <span class="kw-2">&amp;</span>index));
     }
 }
 </code></pre></div>
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